`use_channel_layer` hook

[Archmonger]

Old Behavior

Currently there is no way of sharing component states across multiple clients.

Proposed Actions

Add in the ability for arbitrary data to be synchronized cross-client.

We will use Django Channels layers to communicate a state across multiple clients. In order to use this feature, the user will need to first configure a Django Channels Layer with a backend such as redis.

The user interface might end up looking like this:

@component
def example():
    sender = use_channel_layers(receiver, channel_name="example", group_name="example")

    return ...

async def receiver(event: dict):
    ...

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